package control.filters;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Classe que verifica se o usuário está logado antes de qualquer acesso
 *
 */
public class LoginFilter implements Filter {
	
	public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2) throws IOException, ServletException {
		HttpServletRequest 	request 	= (HttpServletRequest)arg0;
		HttpServletResponse response 	= (HttpServletResponse)arg1;
		
		if(request.getSession().getAttribute("usuario") == null && 
		   !request.getRequestURI().endsWith("index.xhtml") &&
		   !request.getRequestURI().endsWith("AcessoUsuarioHandler")) 
		{
			response.sendRedirect("index.xhtml");			
		} else {
			arg2.doFilter(arg0, arg1);
		}
	}
	
	public void destroy() {
	}
	
	public void init(FilterConfig arg0) throws ServletException {
	}
}
